The period of time after you become enthralled with a movie, television show, or book, and are still stuck in that story's world. You will, for a split second, think that ordinary actions, noises, and, sounds, and objects are going to result in a different outcome based on what fictional world you have just emerged from.

"Dude, I saw someone show thier ID to a bartender and immediately assumed that it was psychic paper. Doctor Who is goving me such a fictional hangover."